Brake-head.



C. S. KNAPP.

BRAKE HEAD APPLICATION FILED DEC. a1. 1913.

l mfl 1 5, Patented Jan. 12, 1915.

PA l

CHARLES S. KNA'EP, Oil CHICAGO, ILLINOIS, ASSIGNOR T JOSEPH W. WEINLAND, U CHICAGO, ILLINOIS.

BRAKE-HEAD.

Specification of Letters Patent.

Patented Jan 112, iota.

Application filed December 31, 1913. Serial No. 809,649.-

To all whom. it may concern:

. wherein the head is held in adjusted'position by amping a portion of the head tightly against the sleeve on the end oiithe beam. in other Constructions, for instance,

the patent to Fowler, No. 990,855, such construction is combined with wedge-means, whereby wedging force is exerted simultaneously with the clamping force. However,

in any construction involving the use ofa split head a certain disadvantage accrues 1n that if the brake shoe becomes broken transversely, a portion of the braking "force is applied to the extreme ends'of the brake head instead of being applied at the lugs near the center supported on the sleeve directly to the middle thereof. This exerts a force tending to break the head, which tendency can best be resisted by constructing the head with continuous bearing-portions around the sleevasuch bearing-portions being in the form of struts which complete the truss. In the split-head construction this strut is absent and the breakage occurs under the circumstances mentioned. 1 pro-.'

pose to obviate this difliculty and at the same time retain the advantageous construction of the Fowler patent referred to. That is, I provide in effect a split-head and a wedge-device, both of which are actuated bythe same bolt, the sides of the brakehead at its point of bearing on the sleeve being circumferentially complete.

The invention will be more readily understood by reference to the accompanying drawings, wherein Figure l is a side elevation of a brakehead constructed in accordance with my in-' vention; Fig. 2 is a rear elevation of the same construction, and, Fig. 3 is a transverse-section on line 3-3 of Fig. 1.

ings, it will be seen that I provide a sleeve 10 having concentric peripheral-grooves 11 therein, on which sleeve is mounted a brakehead 12 having circu'mferentially-complete bearing-portions 13. Thus, a rigid brake-' head is formed, so constructed that should a brake-shoe beedme broken the brakingto weaken the head due force will not ten to unequally appliedforce. In order to further strengthen the body portion of the head I may provideribs or struts 13', extending between the rear of the bearing portion and the face structure of the head thus followingthe contour above the bearing portion. This gives additional resistance to a force. applied to the lower points of the head due to rea'kage of a shoe. The rear portion of the tending between the portions 13 is in the form of a strap 14 integral withthehead at its upper end and separated from the head at its lower end by the space 15. Within the lower end of the strap 14: and also within the head, is provided a recess 16 within which is located a lower wed emember 17 movable with a bolt 19, which bolt extends through the lower end of the strap 14 and accommodates a nut 20. Cooperating with the lower wedge-member 17 is an upper wedge-member 18 normally seated within one of the grooves 1'1 in the sleeve. As an additional safeguard, the key 21, is provided, extending transversely of the lower wedge-member 17. It will be seen thatwith the key 21,in place the wedgemember 17 may not be removed a sufficient distance to permit the lowering of the upper wedge-member 18 to clear the groove 11.

It will be seen that upon tighteningthe nut 20 the wedge-members cooperate to force the upper member against thesleeve', at the same time tightly clamping the strap 14 against the outer surface of the sleeve. The advantages of the split-head and wedge clamping means are thus secured without weakening the brakehead.

I claim:

1. A brake head comprisin a face portion and a bearing portion, sai bearing portion being of annular form and circumferentially unbroken, a strap integrally connected to said head at one end, wedge means, and a bolt actuating both said wedge means and said strap to clamp said head on a brake beam, substantially as described.

brakeehead exmgma 2. In a brake beam, *hhe combination of by ta clamp said; head on said sleeve, suba hearin sleeve a brake haad having constantiall as described,

tinueus bearing portions coiiperaiaing Wifih CHARLES S, KNAPE: sand. sleeve, a strap connected to sand head. Wiifinesses: 5 at (me and wege means, and a bait actmg Cxms, F. MURRAY,

011 Sand strap and said Wedge mes-11s Wh-3e-= D. BUTLER,

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